Android Studio Google Maps 可在 Android 设备上运行，但不能在模拟器上运行

Question

我正在尝试使用从 Google Cloud 平台获得的 Google Maps API 密钥来获取我在 Android Studio 中的当前位置。 如果我在手机上运行该应用程序，一切正常。 如果我在模拟器上运行应用程序，我的位置似乎是 Google Plex，如下图所示（这将是完全错误的）： emulator app showing the wrong location

我不确定这是因为 API 密钥还是代码/权限/GPS 中的错误？ 我从教程中获取了代码，但现在似乎不推荐使用 Google 客户端（不确定这是否是问题所在）。 我相信是因为模拟器，但我不知道为什么。我目前使用的是 Pixel 2 API 26。

我将在这里显示代码：

  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="com.google.android.providers.gsf.permisson.READ_GSERVICES"/>
<meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

BUILD.GRADLE：

implementation 'com.google.android.gms:play-services-maps:17.0.1'
implementation 'com.google.android.gms:play-services-location:18.0.0'

地图活动：

public class GoogleMapsActivity extends FragmentActivity implements OnMapReadyCallback,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    LocationListener {

private GoogleMap mMap;
private GoogleApiClient googleClient;
private LocationRequest locationRequest;
private Location ultimateLocation;
private Marker markerCurrentLocation;
private static final int Request_User_Location_Code = 90;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_google_maps);

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
    {
        checkLocationPermission();
    }

    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    assert mapFragment != null;
    mapFragment.getMapAsync(this);

}

@Override
public void onMapReady(@NotNull GoogleMap googleMap) {
    mMap = googleMap;
    //current location
    if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
        createGoogleApiClient();
        mMap.setMyLocationEnabled(true);
    }


}

protected synchronized void createGoogleApiClient() { // ok
    googleClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    googleClient.connect();

}

@Override
public void onLocationChanged(@NonNull Location location) { // ok
    ultimateLocation = location;
    if (markerCurrentLocation !=null)
    {
        markerCurrentLocation.remove();;
    }
    LatLng coordinates = new LatLng(location.getLatitude(), location.getLongitude());
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.position(coordinates);
    markerOptions.title("Current Location");
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));

    markerCurrentLocation = mMap.addMarker(markerOptions);
    mMap.moveCamera(CameraUpdateFactory.newLatLng(coordinates));
    mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 17.0f));

    if(googleClient!=null)
    {
        LocationServices.FusedLocationApi.removeLocationUpdates(googleClient,this);
    }
    else
    {
        Toast.makeText(this, "NULLLLLLLL", Toast.LENGTH_SHORT).show();
    }

}


@Override
public void onConnected(@Nullable Bundle bundle) { // ok
    locationRequest = new LocationRequest();
    locationRequest.setInterval(1100);
    locationRequest.setFastestInterval(1100);
    locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        LocationServices.FusedLocationApi.requestLocationUpdates(googleClient, locationRequest, this);
    }
}

public boolean checkLocationPermission(){ // ok
    boolean ret;
    if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED){
        if(ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.ACCESS_FINE_LOCATION))
        {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, Request_User_Location_Code);
        }
        else
        {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, Request_User_Location_Code);

        }
        ret = false;
    }
    else
    {
        ret = true;
    }
    return ret;
}
//ok
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode)
    {
        case Request_User_Location_Code:
            if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)== PackageManager.PERMISSION_GRANTED)
                {
                    if(googleClient==null)
                    {
                        createGoogleApiClient();;
                    }
                    mMap.setMyLocationEnabled(true);
                }
            }
            else
            {
                Toast.makeText(this, " PERMISSION DENIED", Toast.LENGTH_SHORT).show();
            }
            return ;
    }
}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

}

Answer 1

只需转到模拟器控件（三点菜单）并在Location 选项卡中，固定地图中的任意位置，然后单击Set Location。

然后验证您是否在应用中收到了预期的位置。